Back windshield for a vehicle



FIG. 1 is a top plan view of a back windshield for a vehicle showing my new design;

FIG. 2 is an elevational front view thereof, the view from the opposite side being a mirror image;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is an elevational side view thereof, the view from the opposite side being a mirror image. 

The ornamental design for a back windshield for a vehicle, as shown and described. 